Pencil sharpener casing



FIG. 1 is an isometric view of the pencil sharpener casing;

FIG. 2 is a first side view;

FIG. 3 is a top view;

FIG. 4 is a bottom view;

FIG. 5 is a second side view;

FIG. 6 is a front view; and,

FIG. 7 is a rear view. 

The ornamental design for a pencil sharpener casing, as shown. 